EP0248239B1 - Verfahren und Vorrichtung zum Herstellen von Formteilen aus thermoplastichem Kunststoff, insbesondere ungereinigten und unsortierten Kunststoffabfällen - Google Patents

Verfahren und Vorrichtung zum Herstellen von Formteilen aus thermoplastichem Kunststoff, insbesondere ungereinigten und unsortierten Kunststoffabfällen Download PDF

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Publication number
EP0248239B1
EP0248239B1 EP19870106910 EP87106910A EP0248239B1 EP 0248239 B1 EP0248239 B1 EP 0248239B1 EP 19870106910 EP19870106910 EP 19870106910 EP 87106910 A EP87106910 A EP 87106910A EP 0248239 B1 EP0248239 B1 EP 0248239B1
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EP
European Patent Office
Prior art keywords
forms
station
extruder
guiding mechanisms
extruder die
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP19870106910
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German (de)
English (en)
French (fr)
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EP0248239A2 (de
EP0248239A3 (en
Inventor
Uwe Heuschkel
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Individual
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Individual
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Priority to AT87106910T priority Critical patent/ATE54598T1/de
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Publication of EP0248239A3 publication Critical patent/EP0248239A3/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B29C2035/1616—Cooling using liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/065—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts containing impurities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/911—Recycling consumer used articles or products
    • Y10S264/92—Recycling consumer used articles or products by extruding material recycled from consumer used article or product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/046—Scrap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/108—Conveyor

Definitions

  • the invention relates to a method for producing molded parts from thermoplastic, in particular unpurified and unsorted plastic waste, in which the plastic is plasticized in a roller extruder and then further processed into pressed and molded parts.
  • the invention further relates to a device for producing molded parts from thermoplastic materials, in particular unpurified and unsorted plastic waste, in which a roller extruder is provided for plasticizing the plastic and in which the plasticized plastic emerging from an extruder nozzle can be filled into molds, in particular for exercising inventive method.
  • US-A 4 189 291 discloses a device in which the waste plastic is filled into a large container from above. At the bottom, the container opens into a cylindrical, heated housing with an eccentrically mounted, heatable and rotatingly driven roller. The plastic waste is drawn into a constantly narrowing gap between the roller and the housing, melted and ejected through several openings at the end of the gap. Comminution of the cooled strands results in a raw material that is largely homogeneous in itself and can be processed into shaped articles with the aid of screw extruders. Alternatively, the extrudates can also be further cooled without further cooling. This device cannot process plastic waste with foreign components such as wood, textiles, glass, stones, metal.
  • Re-granules were usually plasticized for processing in screw extruders.
  • roller extruder (DE-C 2 700 846) seemed to be a way out of the dilemma of ever increasing mountains of thermoplastic industrial and household waste or plastic waste.
  • the roller extruder is so robust that it can not only process unpurified thermoplastic plastic waste or waste, but also tolerates stones or metal parts contained in plastic waste or processes it in such a way that the thermoplastic plastic waste plasticized in it remains homogenized and does not suffer any loss of quality.
  • the plasticized plastic ejected from the extruder nozzle of such roller extruders has been manually calibrated or dosed into pieces of a suitable size, i.e. cut, placed in appropriate molds and pressed in the molds using suitable devices. Objects were made of plastic with weights in the order of a few kilos.
  • DE-A 3 416 553 discloses a squeeze roller press with a downstream metering and loading device for molding presses, in which the aforementioned manual work can be saved and instead mechanized or carried out automatically. Saving manual labor, i.e. their automation requires corresponding, expensive systems and facilities. Their amortization has a cost-increasing effect on the products or moldings, so that their price stands in the way of successful marketing. It has to be taken into account that such molded articles, which are made of plastic with foreign components - even if homogenized - consequently do not even have the quality of molded articles from the above-mentioned regranulates.
  • Thermoplastic plastic waste plasticized in the roller extruder can result in a material that is acid-resistant, weather-resistant and resistant to insects and other debris pest or vegetable pests and has adequate strength.
  • the invention is based on the consideration that suitable products must first be found that customers will find . It has been found that such a range of products should suitably consist of items that are large in size and heavy, not only because it consumes a lot of waste plastic, but also because heavy, chunky items, e.g. B. with a weight of 100 or several hundred kilograms, is no longer spoken of the third choice in terms of quality, but properties that have a quality-reducing effect on small products, can be used optically to promote the product.
  • Solid profiles can be used in the manner of tree trunks for the manufacture of palisades, they can be table tops, warning beacon stands and not prismatic. Like. Form.
  • the object of the invention in the second step of the consideration is to create a method and a device of the type mentioned at the beginning, by means of which the molded parts (products) provided according to the invention can be produced while avoiding extreme system and manufacturing costs.
  • the method mentioned in the introduction is characterized in that the plastic waste in the roller extruder is brought to a pressure of up to approximately 140 bar.
  • Forms arranged horizontally in front of the extruder nozzle, controlled in cycles, which are provided with base plates at least at their extruder-side ends, are pushed in front of the extruder nozzle with the base plates in guides running transversely to the extruder nozzle from a storage zone with a central filling hole in the extruder-side base plate.
  • the mold in front of the extruder nozzle is filled with the plasticized plastic waste under the pressure of the extruder. The filling status of the mold is monitored.
  • a new feed is exerted on the molds in the storage zone, which pushes the filled mold laterally away from the extruder nozzle with the base plate over a waiting zone onto a lift plate inserted in a guide extraction station and thereby closes the filling opening in the base plate , at the same time a new mold is pushed out of the storage zone in front of the extruder nozzle and the extruder-side surfaces of the base plates slide sealingly at the edges of the extruder nozzle during the mold change and temporarily close the extruder nozzle against the escape of plastic.
  • the molds are removed from the removal station and cooled, after which the molded parts are removed and the molds are introduced into an input station of the guides.
  • the device mentioned at the outset is characterized according to the invention in order to achieve the aforementioned object in that the roller extruder builds up pressure in orders of magnitude of up to 140 bar and is designed to be tight against this pressure.
  • the molds have at least at one end, molds with a cross-section which is variable over their length, at least at the end with the largest cross-section, a base plate which projects beyond the outer contour of the mold.
  • the base plate has a filling opening centered on the shape cross section and adapted to the shape of the extruder nozzle.
  • guides are arranged, which are also perpendicular to the direction of ejection of the extruder nozzle.
  • the base plates are held in the guides with the upper and lower edges in the case of lying shapes oriented with their longitudinal axes parallel to the direction of ejection.
  • the base plate on the extruder side is sealingly guided on the surface surrounding the extruder nozzle.
  • the guides are open at one end in a feed station.
  • the molds can be inserted into the guides with the filling openings first.
  • a pressure cylinder oriented in the longitudinal center direction of the guides and having a working stroke length corresponding to the base plate width is provided at the feed station.
  • a storage station is provided, the length of which corresponds at least to the width of the base plate of a mold.
  • the filling station with the extruder nozzle is located next to the storage station.
  • a waiting zone is preferably provided next to the filling station, the length of which corresponds to the width of a plurality of base plates, at least one mold with its base plate sealingly abutting behind the extruder nozzle on the surface that surrounds the extruder nozzle or on another surface is led.
  • a lifting station is provided, in which the molds have closed filling openings and can be removed from the guides by means of a lifting plate which can be inserted into the guides and which is sealingly held on the base plate.
  • the roller extruder known per se was sealed and redesigned in such a way that a pressure of up to 140 bar can be built up in the plasticized plastic and that the bearings can also withstand and reliably seal this pressure.
  • a pressure of up to 140 bar can be built up in the plasticized plastic and that the bearings can also withstand and reliably seal this pressure.
  • the base plate which covers the mold on the front, has a filling opening in the center that is adapted in shape and size to the extruder nozzle and is pushed in a controlled manner in front of the extruder nozzle by a pressure cylinder.
  • Control openings on the back of the mold which are monitored by optical sensors, determine when the mold is filled and give the pressure cylinder the work signal to replace the mold. This process takes place in that an empty mold is kept ready in the guide (s) in a storage zone, which is pushed in front of the extruder nozzle when the replacement is necessary and at the same time pushes the filled mold in front of itself.
  • the mold can now be transported in a filled state and stored or conveyed until the plastic solidifies inside.
  • a new shape is inserted into a guide feed station.
  • a storage station can follow the feed station, in which one or more empty molds are waiting in the guides, in the filling station, i. H. in front of the extruder nozzle to be pushed.
  • the molds are provided with base plates at both ends, and claim 12 provides that both base plates have the same shape and size, depending on the molded part, it may be possible or necessary to use base plates of various shapes, square, rectangular, round or the like.
  • the invention also makes it possible (thanks to the high pressure built up in the extruder) to produce molded parts of relatively great length if only a certain minimum ratio of cross section and length is maintained. It has been found that satisfactory filling of molds and thus also the satisfactory production of molded parts is possible if the length of a mold is not greater than 15 times the circular diameter of the cross section. In the case of shapes of other cross-sections, the cross-sectional area must be mathematically converted into a circular area and thus the circle diameter must be determined, which is decisive for the greatest possible length of the shape. Due to this measure, unexpectedly long molded parts can be produced.
  • a fully automated production and device for solving the aforementioned object is also provided, the method using the already mentioned solution features being characterized in that the filling of the molds, the cooling, the feeding of the empty molds to the input station of the Guides and the intermittent replacement of the filled molds are carried out automatically in front of the extruder nozzle.
  • the device already mentioned is characterized according to a further feature of the invention using the device features already mentioned to solve the aforementioned problem in that the lifting station of the guides is connected to a conveyor running at right angles to the guides.
  • This conveyor is integrated into a cooling device with a water bath and pneumatic grate and is provided at its end with a mold removal station, which is located next to a demolding station.
  • a further conveyor is provided at right angles to this conveyor, which has lateral guide walls for the longitudinal orientation of the empty molds and has a discharge end which is adjacent to a carousel, which rotates the molds 90 degrees uniformly with the filling openings in front and by means of a pressure cylinder on an intermediate conveyor, which runs and feeds at right angles to the conveyor in the direction of the feed-in station, postpones.
  • a U-rail runs parallel to the side of the end of the intermediate conveyor and two pressure cylinders are provided opposite it, which push the molds onto the U-rail transversely to itself.
  • the U-rail opens into the feed station of the guides and has a pressure cylinder at the end facing away from the feed station, which pushes the molds into the feed station. All pressure cylinders, the conveyor, etc. are controlled by touch contact.
  • the pressure cylinder of the guides is controlled by means of optical sensors assigned to the control holes of the molds in the filling station.
  • the filling opening of the base plates of the molds is kept closed until it is ensured by solidification or cooling at the edge zones that the plastic no longer flows out of the mold. Thereafter, it can be handled more freely and rapid cooling takes place in a water bath and with the help of a pneumatic grate.
  • the molds are then removed by hand, removed from the mold and released by hand onto the conveyor. From there an alignment takes place, on the carousel a turn and uniform orientation in such a way that the molds lie with the filling openings in front, and on the intermediate conveyor the further transport in the direction of the feed station of the guides.
  • the measure of the invention is to provide the molds with control openings in order to monitor the filling status of the molds by means of optical sensors; because the method and the device according to the present invention could not work with a fixed predetermined time cycle.
  • the special operation of the roller extruder must be taken into account.
  • a roller extruder (1) is shown schematically in each case in the form of a breakdown, which enables plastic waste of a thermoplastic type to be plasticized, unpurified and unsorted, homogenized and ejected from an extruder nozzle (2).
  • the structure of the roller extruder (1) is not shown in detail and is not shown is that the plastic waste is crushed beforehand to a particle size of approximately 6 mm and is metered into the roller extruder (1) in a metered manner by means of a rotary valve.
  • the conventional roller extruder (1) was or is modified in such a way that, in addition to the friction or friction plasticization of the plastic waste, it has the ability to process it without being cleaned, including possible inclusion of stones or metal To achieve homogenization and at the same time to generate a pressure of up to 140 bar in the plasticized, homogenized plastic mass.
  • This modification also presupposes the improvement of the roller bearings not shown in the drawings; because this must withstand the high developed pressures.
  • the molds (3) must be anchored against the pressure of the plasticized plastic emerging from the extruder nozzle (2), because otherwise they would be pushed away from the extruder nozzle (2) or the emerging plastic.
  • the molds (3) have at least on the filling side a base plate (4) which has a filling opening (5) in the center of the mold (3) which is adapted in shape and size to the shape and size of the extruder nozzle (2) .
  • the base plate (4) is vertical when filling, the shape runs horizontally with its longitudinal axis.
  • guides (6) are provided, which according to FIGS. B.
  • the forms (3) are naturally designed, depending on the type of molded part to be produced. Bearing in mind the special product range, they are large-sized and can hold up to 100 kg of plasticized plastic or more.
  • FIG. 1 shows the longitudinal section of a mold (3) which has base plates (4) at both ends, the extruder-side base plate (4) having the filling opening (5).
  • a shape for a prismatic body is shown, for example with a circular, square or other cross-section.
  • the shape is acc. Fig. 1 closed by means of the base plate (4), but has control openings (9) at the upper and lower area. If a mold (3) is in front of the extruder nozzle (2), optical sensors (10) control the filling process through the control openings (9):
  • FIGS. 3 and 4 show shapes (3) which have only one base plate (4) and which are provided for non-prismatic, for example conical or conical shaped parts.
  • the control openings (9) and optical sensors (10) can be provided in these molds (3) at locations of the molds (3) which have been experience-tested.
  • forms can be used for universal plates, for differently designed solid bodies or for hollow bodies.
  • the molds (3) should have two base plates (4) to make handling easier.
  • the shapes can have a relatively high degree of slenderness, e.g. B. to produce rod material if only the ratio of cross section to length is observed, which allows the pressure built up in the roller extruder (1) to fill the mold (3) properly. If a shape with a circular cross-section has a circular diameter of, for example, 20 cm, then it may have a maximum of 300 cm, ie 15 times as long as the circular diameter.
  • the cross-sectional area In the case of other cross-sections or even hollow bodies, the cross-sectional area must be converted to a circle of the same area in order to calculate the diameter ratio to the length. In the case of molds with cross-sectional sizes that vary over their length, the largest cross-section should be at the filling opening (5).
  • a roller extruder (1) is not able to eject plasticized plastic from its extruder nozzle (2) in precisely metered equal quantities to the second or fraction of a second, but there are certain fluctuations. For this reason, the changing of the molds (3) in front of the extruder nozzle (2) cannot take place in a time-controlled manner, but must be carried out by means of the control openings (9) through the optical sensors (10). The filled molds (3) must not remain in front of the extruder nozzle (2) when they are filled, because otherwise the back pressure would develop in the roller extruder (1) above the already developed high pressure. On the other hand, a roller extruder (1) cannot be stopped to change the molds, but must continue to run.
  • the optical sensors (10) actuate appropriate switching means when the desired filling of a mold is determined in order to actuate a pressure cylinder (11), a pneumatic cylinder.
  • This pneumatic cylinder (11) is arranged in front of an infeed station (12) of the guides (6).
  • a mold (3) has been introduced into the feed station (12) with the filling opening (5) ahead.
  • a previously fed mold (3) is already in a waiting position in a storage station (13) and the mold (3) to be filled is located in front of the extruder nozzle (2).
  • the pressure cylinder (11) By actuating the pressure cylinder (11), a thrust in the longitudinal direction of the guides (6) is exerted on the freshly fed-in mold (3). This feed takes place extremely quickly.
  • the base plate (4) slides already filled mold (3) either on the surface (8) surrounding the extruder nozzle (2) or on the appropriately designed frame (7) of the guides in such a way that the filling opening (5) remains closed and at the same time the extruder nozzle (2) is tightly closed while the sliding movement is being carried out. Under the same conditions, an empty mold is pushed out of the storage station (13) in front of the extruder nozzle (2) and the filling process begins.
  • a lifting station (14) immediately follows the filling station or extruder nozzle (2).
  • a lifting plate (15) is inserted into the empty lifting station (14), which includes the base plate (4), which has the filling opening (5), in the manner of the guides (6).
  • the filled mold with the filling opening (5) is pushed onto the lifting plate (15), the filling opening (5) is thus closed.
  • the filled mold can be removed, cooled and removed from the mold. After removal from the mold, the empty mold (3) can be fed back into the guides (6) in the feed station (12).
  • the guide (6) is equipped with a storage station (13) which is able to accommodate two forms (3).
  • the pressure cylinder (11) pushes an empty mold in the feed station (12), two empty molds (3) in the storage station (13) and a filled mold (3) away from the extruder nozzle (2), wherein the filled mold (3) is pushed into the lifting station (14) on the lifting plate (15).
  • Figures 5 and 6 only show variants; the number of shapes per station, in particular in the storage station (13), can be varied.
  • Loading the device with molds (3) and removing the filled molds (3) into the feed station (12) or from the lifting station (14), inserting the lifting plates (15) is manual work or must be carried out by suitable rationalization-appropriate devices .
  • FIG. 7 shows a fully automatic device.
  • the device according to. Fig. 1 - 6 taken. This means that guides (6) for the molds (3) with base plates (4) and in the extruder-side base plate (4) have a filling opening (1) in front of the roller extruder (1) with the special properties already described and its extruder nozzle (2). 5) are provided. There is a feed station (12), a storage station (13) and a lifting station (14). In order to save the manual work, the insertion of the lifting plates (15), but on the other hand to save the development and investment costs for an insertion device for the lifting plates (15), it is varied in such a way that the use of lifting plates (15) becomes superfluous.
  • the storage station (13) can be shortened so that it only takes one shape.
  • the lifting station (14) of the automatic device ends according to the corresponding length, i.e. H.
  • a cooling device (17) is therefore connected to this conveyor (16). It is not shown in detail that this cooling device (17) has a water bath in which the filled molds (3) are immersed and cooled and are guided over a pneumatic grate and at the end again lifted out of the water bath and a removal station or device are fed.
  • An automatic demolding device could be assigned to the removal device or station (18).
  • a storage platform (19) is provided, on which the molds (3) are demolded by hand, i. H. Shaped parts (20) are removed and placed on the storage platform (19).
  • the conveyor (16) connects to the course of the guides (6) at right angles.
  • the loading end of a further conveyor (21) is connected again at right angles to the removal station (18).
  • the molds (3) are placed on this further conveyor (21), should be placed with the base plate (4), which has the filling opening (5), as far forward as possible, i.e. pointing in the conveying direction.
  • the conveyor (21) has guide walls (22).
  • the discharge end of the onward conveyor (21) pushes the molds (3) onto a carousel (23).
  • the carousel (23) is assigned pressure cylinders (24), each of which rotates the carousel (23) by 90 degrees and thus causes the carousel (23) to open Rotate the pushed molds (3) with the filling opening (5) first by 90 degrees, while another pressure cylinder (24) ensures that the molds (3) are pushed onto the loading end of an intermediate conveyor (25) after the 90-degree rotation .
  • the molds (3) of further lateral guide walls (22) are oriented lengthways.
  • the intermediate conveyor (25) extends from the carousel (23) to the vicinity of the feed station (12) of the guides (6).
  • two pressure cylinders (26) are provided, which work at right angles to the length of the intermediate conveyor (25).
  • a U-rail (27) which runs parallel to the intermediate conveyor (25) and opens into the feed station (12) of the guides (6). If a form (3) gets into the working area of the pressure cylinder (26), it is pushed into the U-rail (27) transversely to itself.
  • the U-rail (27) has a pressure cylinder (28) which pushes the mold further in the direction of the feed station (12) in the U-rail (27).
  • the already mentioned pressure cylinder (11) is active in the feed station (12) and feeds molds (3) into the guides (6) in cycles depending on the optical sensors (10).
  • the individual working strokes of the pressure cylinders are controlled by pressure contacts, with the exception of the pressure cylinder (11), so that a smooth operation is guaranteed.
  • the storage lengths for molds (3) provided in the U-rail (27) make it possible to compensate for irregular feed cycles of empty molds.
  • the individual working strokes, strokes etc. are monitored by a control cabinet 29, with safety interlocks and usual measures being provided to ensure that the process runs smoothly.
  • the molded parts (20) are stored and transported away on a storage platform (19), the empty molds (3) are transferred to a further conveyor (21), turned by the carousel (23) and again by the intermediate conveyor (25) via the U-rail ( 27) returned to the feed station (12). This ensures a cycle of forms.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
EP19870106910 1986-06-06 1987-05-13 Verfahren und Vorrichtung zum Herstellen von Formteilen aus thermoplastichem Kunststoff, insbesondere ungereinigten und unsortierten Kunststoffabfällen Expired - Lifetime EP0248239B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87106910T ATE54598T1 (de) 1986-06-06 1987-05-13 Verfahren und vorrichtung zum herstellen von formteilen aus thermoplastichem kunststoff, insbesondere ungereinigten und unsortierten kunststoffabfaellen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3619144 1986-06-06
DE19863619144 DE3619144A1 (de) 1986-06-06 1986-06-06 Verfahren und vorrichtung zum herstellen von formteilen aus thermoplastischem kunststoff, insbesondere ungereinigten und unsortierten kunststoffabfaellen

Publications (3)

Publication Number Publication Date
EP0248239A2 EP0248239A2 (de) 1987-12-09
EP0248239A3 EP0248239A3 (en) 1989-07-12
EP0248239B1 true EP0248239B1 (de) 1990-07-18

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EP19870106910 Expired - Lifetime EP0248239B1 (de) 1986-06-06 1987-05-13 Verfahren und Vorrichtung zum Herstellen von Formteilen aus thermoplastichem Kunststoff, insbesondere ungereinigten und unsortierten Kunststoffabfällen

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US (2) US4874566A (enrdf_load_stackoverflow)
EP (1) EP0248239B1 (enrdf_load_stackoverflow)
AT (1) ATE54598T1 (enrdf_load_stackoverflow)
DE (1) DE3619144A1 (enrdf_load_stackoverflow)
ES (1) ES2016947B3 (enrdf_load_stackoverflow)

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DE4204831C2 (de) * 1991-02-21 2001-08-09 Phoenix Ag Matte
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DE4211768C2 (de) * 1992-04-08 1994-05-11 Spiess Kunststoff Recycling Verfahren und Vorrichtung zum automatischen Herstellen von Gegenständen hoher Oberflächengüte aus Recycling-Kunststoff
DE4217114A1 (de) * 1992-05-25 1993-12-02 Kuhne Anlagenbau Gmbh Anlage zur Herstellung von Formteilen aus thermoplastischen Stoffen
US5238381A (en) * 1992-07-20 1993-08-24 Ford Motor Company Disposable vent lines with reusable monitors for fabricating molded workpiece
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US6649120B1 (en) 1999-09-29 2003-11-18 R&B Machine Tool Company Blow molding apparatus and method
DE19946571C1 (de) * 1999-09-29 2000-10-05 Unicor Rohrsysteme Gmbh Vorrichtung zum Herstellen von Rohren mit querprofilierter Wandung
US7833006B2 (en) * 2001-02-12 2010-11-16 Graham Packaging Plastic Products, Inc. Single-sided shuttle-type blow molding apparatus
DE102006027254B4 (de) * 2006-06-09 2009-01-15 Kautex Textron Gmbh & Co. Kg Verfahren zur Herstellung von Hohlkörpern aus thermoplastischem Kunststoff durch Extrusionsblasformen
US8701569B2 (en) 2008-06-20 2014-04-22 Oria Collapsibles, Llc Pallet design with structural reinforcement
US8438981B2 (en) 2008-06-20 2013-05-14 Oria Collapsibles, Llc Pallet design with buoyant characteristics
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Also Published As

Publication number Publication date
ES2016947B3 (es) 1990-12-16
DE3619144C2 (enrdf_load_stackoverflow) 1989-12-14
EP0248239A2 (de) 1987-12-09
ATE54598T1 (de) 1990-08-15
DE3619144A1 (de) 1987-12-10
US4874566A (en) 1989-10-17
US5032072A (en) 1991-07-16
EP0248239A3 (en) 1989-07-12

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